• How Rare (or Common) is it to Have a PhD?

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How Rare (or Common) is it to have a PhD?

The number of students going to university around the world continues to grow – and so does the level of qualifications they’re attaining. For example, according to official data , over a third of UK university students gained a first-class degree in 2021 and 82 per cent of students gained a 2:1 or a first, which is up from 75 per cent in 2017.

This increase reflects a rise in demand for skilled labour, a greater demand for higher education and the growing availability of financial support for people going into university (including PhD funding ). The number of students taking on the challenges and opportunities that come with postgraduate study is also growing.

But how many of these people are going on to do a PhD? Well, my own PhD is in Biochemistry, not Statistics. But, thanks to OECD and other official government sources, there is some interesting data available on the number of people with a PhD around the world.

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What percentage of the population have a PhD?

On average, only 1 per cent of the world’s 25-64 year olds who have been to university, have a PhD. So it seems like a PhD is pretty rare – but how rare is it where you are?

Countries with the highest proportion of 25-64 year olds with a doctoral degree
4%
3%
3%
2%
2%
2%
2%
2%

Source: OECD Education at a Glance 2023 (Table: Education attainment of 25-64 year-olds (2022)

In the UK 2 per cent of the population has a doctorate. Slovenia and Switzerland have the highest percentage of the population with a doctorate at 4 per cent and 3 per cent respectively. This data has been taken from the most recent OECD report.

How equal is PhD study?

The distribution of men and women doing a PhD also varies from country to country. According to the Higher Education Statistics Agency (HESA) , in the UK, 48 per cent of graduates with a doctoral qualification were female and 51 per cent were male in 2021-22.

Across the world, the percentage of men with a doctoral qualification is generally higher than women. 2022 Census data from the Unties States shows that 54% of doctoral graduates were male and only 45% were female.

The trend shown above is not a new one. For years, women have been underrepresented in PhD study, particularly in STEM (Science, Technology, Engineering and Maths) subjects, but this is gradually growing . In recent years, many initiatives supporting and encouraging women in STEM subjects have been established to break the stereotypes. These include Women in STEM which aim to showcase the opportunities for women in STEM subjects and Athena SWAN which celebrates good practices in higher education and research institutions. These are just a few examples of organisations which are fighting to close the gender gap.

The most popular doctoral programmes are in natural sciences and maths with engineering, health and the arts all coming a close second. The table below shows the distribution of men and women who have graduated with a doctorate, by field of study.

Distrubution of women and men by field of study
Subject Area Women Men
Arts and humanities 51% 49%
Nature sciences, mathematics and statistics 42% 58%
Business, administration and law 45% 55%
Engineering, manufacturing and construction 26% 74%

Source: OECD Data (Table: Graduates by field 2021)

And is it all worth it?

Well, that’s a topic for another blog – or perhaps a full article. But, in a nutshell, a PhD is likely to help you. For one thing, the average employment rate for graduates with a doctoral degree is a whopping 97% . But, it’s not just getting the PhD qualification that puts you above the rest, it’s the years of experience and the skill set that you develop. Being able to put ‘Dr’ before your name is cool and all, but you also get plenty of transferable skills along the way.

So, in conclusion, you won’t be alone as a PhD holder, but you might be one in a million, statistically speaking. Or something like that. I’m fed up of numbers.

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How many people have a PhD? Data from OECD countries

Featured blog post image for How many people have a PhD - data from OECD countries

When working in academia, it is easy to forget how rare it is to have a PhD. However, data show that only a very small percentage of people hold a PhD degree. Learn more about the percentages of PhD holders, in addition to the numbers of PhD graduates and new PhD students in selected OECD countries.

Percentages of doctoral degree holders

According to the OECD’s Education at a Glance 2022 report, 1.3% of adults (25-64 year-olds) held a PhD in 2021 across the thirty-eight OECD countries.

There are of course country-specific differences. In Denmark and Germany, for instance, roughly 1% of the total population held a PhD in 2021. In the US and the UK, approximately 2% of the total population held a PhD in 2021. And in Slovenia, it was 5% of the population in 2021!

In the Education at a Glance 2022 report, the percentages of people who obtained a doctoral degree in 2021 are rounded up. In reality, more subtle differences exist between countries. More detailed data are available on the percentage of adults (25-64 year-olds) with a doctoral degree in 2017. While this data is older, it paints a more varied picture of the differences between countries:

Numbers of PhD graduates

Every year, new people graduate with a PhD degree. Unfortunately, the OECD only records data from PhD graduates who are younger than 35 years. Personally, I find this choice surprising as doing a PhD later in life has many advantages . I would assume that there is a high number of PhD graduates every year who are older than 35.

In the UK, for instance, 2163 female individuals graduated with a PhD degree in 2020, compared to 2335 male individuals. Canada, on the other hand, gained 838 female and 1003 male new PhD holders in 2020. Unfortunately, data on gender distributions of PhD graduates was not available for the US.

 
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Data on new PhD students

Every year, new individuals enroll in doctoral degree studies. According to the OECD’s Education at a Glance 2022 report, the total number of new PhD students across the OECD decreased by 4% between 2013 and 2020. However, the report also stipulates that this average decrease is heavily influenced by a large drop in new PhD students in Poland (-77%) and in the Slovak Republic (-26%).

 
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Across OECD countries, the median age of people starting with a doctoral degree is 29 years (Source: Education at a Glance 2022 ).

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Doctorate Recipients from U.S. Universities

This series presents data and trends on doctorates awarded from all U.S. universities. Information is also available on characteristics of doctorate recipients, institutions awarding doctorates, and postgraduation plans of doctorate recipients.

Explore the Survey of Earned Doctorates data further via NCSES's and
documents the history of U.S. doctoral education from 1861 through 1999

Most recent data year

  • Doctorate Recipients from U.S. Universities: 2022 Special Reports | NSF 24-300 | December 5, 2023
  • Doctorate Recipients from U.S. Universities: 2022 Data Tables Data Tables | NSF 24-300 | September 28, 2023
  • Research Doctorate Conferrals Rebound, Leading to Record Number of U.S. Doctorate Recipients in 2022 InfoBriefs | NSF 23-353 | September 28, 2023
  • Doctorate Recipients from U.S. Universities: 2021 Special Reports | NSF 23-300 | December 5, 2022
  • Doctorate Recipients from U.S. Universities: 2021 (Data Tables) Data Tables | NSF 23-300 | October 18, 2022
  • Survey of Earned Doctorates Field of Study Taxonomy Changes in 2021 and Impact on Trend Data Working Papers | NCSES 23-200 | October 18, 2022
  • Baccalaureate Origins of Underrepresented Minority Research Doctorate Recipients InfoBriefs | NSF 22-335 | August 9, 2022
  • Baccalaureate Origins of U.S. Research Doctorate Recipients InfoBriefs | NSF 22-321 | March 14, 2022
  • Doctorate Recipients from U.S. Universities: 2020 Special Reports | NSF 22-300 | November 30, 2021
  • Doctorate Recipients from U.S. Universities: 2020 Data Tables | NSF 22-300 | October 5, 2021
  • Survey of Doctorate Recipients, Longitudinal Data: 2015–19 Data Tables | NSF 22-326 | June 1, 2022
  • Doctorate Recipients from U.S. Universities: 2019 Special Reports | NSF 21-308 | December 1, 2020
  • Doctorate Recipients from U.S. Universities: 2019 Data Tables Data Tables | NSF 21-308 | December 1, 2020
  • Doctorate Recipients from U.S. Universities: 2018 Special Reports | NSF 20-301 | December 3, 2019
  • Doctorate Recipients from U.S. Universities: 2018 Data Tables Data Tables | December 3, 2019
  • Doctorate Recipients from U.S. Universities: 2017 Special Reports | NSF 19-301 | December 4, 2018
  • Doctorate Recipients from U.S. Universities: 2017 Data Tables Data Tables | December 4, 2018
  • Doctorate Recipients from U.S. Universities: 2016 Report Special Reports | NSF 18-304 | March 29, 2018
  • Doctorate Recipients from U.S. Universities: 2016 Data Tables | NSF 18-304 | December 6, 2017
  • Doctorate Recipients from U.S. Universities: 2015 Report Special Reports | NSF 17-306 | June 28, 2017
  • Doctorate Recipients from U.S. Universities: 2015 Data Tables | NSF 17-306 | December 6, 2016
  • Doctorate Recipients from U.S. Universities: 2014 Report (A) Special Reports | NSF 16-300 | March 31, 2016
  • Doctorate Recipients from U.S. Universities: 2014 (A) Detailed Statistical Tables | NSF 16-300 | December 3, 2015
  • Doctorate Recipients from U.S. Universities: 2013 Digest (A) Special Reports | NSF 15-304 | April 29, 2015
  • Doctorate Recipients from U.S. Universities: 2013 (A) Detailed Statistical Tables | NSF 15-304 | December 3, 2014
  • Doctorate Recipients from U.S. Universities: 2012 Digest (A) Special Reports | NSF 14-305 | January 16, 2014
  • Doctorate Recipients from U.S. Universities: 2012 Data Tables (A) Detailed Statistical Tables | NSF 14-305 | December 5, 2013
  • Baccalaureate Origins of U.S.-trained S&E Doctorate Recipients (A) InfoBriefs | NSF 13-323 | April 22, 2013
  • Doctorate Recipients from U.S. Universities: 2011 (A) Detailed Statistical Tables | NSF 13-301 | December 5, 2012
  • Science and Engineering Doctorate Awards: 2009–10 (A) Detailed Statistical Tables | NSF 13-322 | July 2, 2013
  • Doctorate Recipients from United States Universities: 2010 Data Tables (A) Detailed Statistical Tables | NSF 12-305 | December 6, 2011
  • Numbers of Doctorates Awarded in the United States Declined in 2010 (A) InfoBriefs | NSF 12-303 | November 22, 2011
  • Doctorate Recipients from U.S. Universities: 2009 (A) Special Reports | NSF 11-306 | December 1, 2010
  • Numbers of Doctorates Awarded Continue to Grow in 2009; Indicators of Employment Outcomes Mixed (A) InfoBriefs | NSF 11-305 | November 22, 2010
  • Science and Engineering Doctorate Awards: 2007–08 (A) Detailed Statistical Tables | NSF 11-321 | August 22, 2011
  • Doctorate Recipients from U.S. Universities: Summary Report 2007-08 (A) Special Reports | NSF 10-309 | December 2, 2009
  • Numbers of U.S. Doctorates Awarded Rise for Sixth Year, but Growth Slower (A) InfoBriefs | NSF 10-308 | November 19, 2009
  • 2007 Records Fifth Consecutive Annual Increase in U.S. Doctoral Awards (A) InfoBriefs | NSF 09-307 | November 21, 2008
  • Doctorate Recipients from U.S. Universities: Summary Report 2006 (A) Special Reports | SRS 09-321 | February 5, 2010
  • Science and Engineering Doctorate Awards: 2006 (A) Detailed Statistical Tables | NSF 09-311 | March 13, 2009
  • Doctorate Recipients from U.S. Universities: Summary Report 2005 (A) Special Reports | SRS 07-337 | February 5, 2010
  • S&E Doctorate Awards: 2005 (A) Detailed Statistical Tables | NSF 07-305 | December 22, 2006
  • S&E Doctorates Hit All-time High in 2005 (A) InfoBriefs | NSF 07-301 | November 17, 2006
  • Doctorate Recipients from U.S. Universities: Summary Report 2004 (A) Special Reports | SRS 06-331 | February 5, 2010
  • S&E Doctorate Awards: 2004 (A) Detailed Statistical Tables | NSF 06-308 | March 14, 2006
  • 2004 Doctorate Awards Increase in Science and Engineering Fields for the Second Year in a Row (A) InfoBriefs | NSF 06-301 | November 22, 2005 (Revised: December 9, 2005)
  • Doctorate Recipients from U.S. Universities: Summary Report 2003 (A) Special Reports | SRS 05-323 | February 5, 2010
  • S&E Doctorate Awards: 2003 (A) Detailed Statistical Tables | NSF 05-300 | December 9, 2004
  • Doctorate Recipients from U.S. Universities: Summary Report 2002 (A) Special Reports | SRS 04-338 | February 5, 2010
  • S&E Doctorate Awards: 2002 (A) Detailed Statistical Tables | NSF 04-303 | October 28, 2003
  • S&E Doctorate Awards: 2001 (A) Detailed Statistical Tables | NSF 03-300 | October 25, 2002
  • Doctorate Recipients from U.S. Universities: Summary Report 2001 (A) Special Reports | SRS 03-328 | December 28, 2001
  • Doctorate Recipients from U.S. Universities: Summary Report 2000 (A) Special Reports | SRS 02-334 | February 5, 2010
  • S&E Doctorate Awards: 2000 (A) Detailed Statistical Tables | NSF 02-305 | November 13, 2001
  • Doctorate Recipients from U.S. Universities: Summary Report 1999 (A) Special Reports | SRS 01-339 | February 5, 2010
  • S&E Doctorate Awards: 1999 (A) Detailed Statistical Tables | NSF 01-314 | February 5, 2001
  • Doctorate Recipients from U.S. Universities: Summary Report 1998 (A) Special Reports | SRS 00-331 | February 5, 2010
  • S&E Doctorate Awards: 1998 (A) Detailed Statistical Tables | NSF 00-304 | November 15, 1999
  • Doctorate Recipients from U.S. Universities: Summary Report 1997 (A) Special Reports | SRS 99-359 | February 5, 2010
  • S&E Doctorate Awards: 1997 (A) Detailed Statistical Tables | NSF 99-323 | March 1, 1999
  • Doctorate Recipients from U.S. Universities: Summary Report 1996 (A) Special Reports | SRS 97-337 | February 5, 2010
  • S&E Doctorate Awards: 1996 (A) Detailed Statistical Tables | NSF 97-329 | December 23, 1997
  • Doctorate Awards Increase in S&E Overall, but Computer Science Declines for First Time (A) InfoBriefs | NSF 97-325 | November 7, 1997
  • Doctorate Recipients from U.S. Universities: Summary Report 1995 (A) Special Reports | SRS 96-335 | February 5, 2010
  • Science & Engineering Doctorate Awards Are at an All-Time High (A) InfoBriefs | NSF 96-307 | June 12, 1996
  • Selected Data on S&E Doctorate Awards: 1995 (A) Detailed Statistical Tables | NSF 96-303 | June 12, 1996
  • Doctorate Recipients from U.S. Universities: Summary Report 1994 (A) Special Reports | SRS 95-344 | February 5, 2010
  • Selected Data on S&E Doctorate Awards: 1994 (A) Detailed Statistical Tables | NSF 95-337 | December 1, 1995
  • Survey of Earned Doctorates

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Last Updated: November 19, 2018

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Doctorates Awarded by Country 2024

A doctorate is the highest achievement possible for professionals, experts, and academics in various fields. However, there are sharp disparities from one nation to another when it comes to earning this degree.

The United States awards the world's largest number of doctorates, approximately 71,000 per year. These are split almost equally between men and women. China takes second place with over 56,000 doctorates annually, though men make up more than 60% of them. There's a steep drop to India in third, with nearly 29,000 doctorates per year, about half of China's total. Once again, men make up the majority. Germany , the United Kingdom , and Russia all produce roughly even amounts of doctorates, around 27,000-28,000 per year. Just ten nations earn more than 10,000 doctoral degrees annually. Overall, approximately 277,000 doctoral degrees are awarded worldwide each year.

There are plenty of countries on the opposite end of the spectrum as well. Costa Rica and Iceland are tied for the lowest amount of doctorates awarded, approximately 100 per year. Ten nations produce less than 1,000 doctoral degrees annually, most of which have a relatively low to moderate population and similar income levels. A significant number of countries, including much of Africa and Central Asia , either produce no doctorates or don't compile or release the amount.

While men typically outnumber women when it comes to being awarded doctoral degrees, there are a few nations where the opposite is true. These include Brazil (11,800 vs. 9,900), Spain (10,100 vs. 9,900), Italy (4,800 vs. 4,600), Mexico (4,800 vs. 4,600), and Poland (1,800 vs 1,400.)

Differences in global attainment of doctorates can be chalked up to a variety of factors. Naturally, higher-population countries will typically produce a larger raw number of doctoral degree recipients. It's also crucial to consider income, as well as cultural attitudes and access to higher education.

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56.522.234.3
28.816.3
28.412.715.7
28.113.215
27.312.414.9
21.611.89.9
2010.19.9
15.74.810.9
13.66.17.4
9.44.84.6
9.34.84.6
9.24.54.6
83.84.2
633.1
4.72.32.5
4.31.62.7
4.21.92.3
3.61.62
3.21.81.4
2.91.31.6
2.81.21.6
2.61.21.4
2.411.5
2.31.31
2.21.11.2
2.11.21
1.90.81
1.910.9
1.60.90.8
1.50.70.8
1.50.70.7
1.40.70.7
1.20.60.6
0.80.30.5
0.70.30.4
0.50.10.4
0.50.20.3
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0.30.10.1
0.20.10.1
0.20.10.1
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Which country awards the most doctorates per year?

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Population with Doctorate Degrees in the U.S.

THURSDAY, JAN 14, 2021

When President-elect Joe Biden is sworn in as president on Jan. 20, his wife Jill will become the first resident with a doctorate in more than a century. Roughly 3.1 million Americans older than 25 have a doctorate degree, according to a Social Explorer analysis of newly released 2015-19 American Community Survey data.

Not surprisingly, Los Alamos, N.M., home to a major national research laboratory, has the highest percentage of people with doctorate degrees in the nation, at 17.7 percent – nearly twice the 9.5 percent reported by Tompkins County, N.Y., home of Cornell University. Orange County, N.C., home of the University of North Carolina at Chapel Hill, ranks third at 8.9 percent. More than 100 counties have no residents with doctorate degrees. To see the percentage of people in your county with doctorate degrees, use Social Explorer’s customizable, online mapping tools.

Population with Doctorate Degrees, 2019. Click here to explore further.

Author: Frank Bass

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percentage of phd holders

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These tables present detailed data on the demographic characteristics, educational history, sources of financial support, and postgraduation plans of doctorate recipients. Explore the Survey of Earned Doctorates (SED) data further via the interactive data tool and the new Restricted Data Analysis System . Kelly Kang Survey Manager, SED Human Resources Statistics Program, NCSES

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Doctorate recipients from U.S. colleges and universities

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Doctorate-granting institutions

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Field and demographic characteristics of doctorate recipients

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Educational history of doctorate recipients

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Financial support for graduate education of doctorate recipients

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Postgraduation commitments of doctorate recipients

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Statistical profile of doctorate recipients

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What ratio of PhD graduates in STEM fields ultimately end up as (tenured) professors?

I recently saw this infogram circling around various social networks:

enter image description here

It appeared in this Tweet with the following claim:

Got a PhD? Your chance of becoming a Professor is 0.45%. Good luck.

Being a bit sceptical of the claim and of shiny info-grams in general, I traced the image back through this blog to this report by the Royal Society (see page 14), featuring various reputable academics in the introduction. The report cites a number of other reports from UK organisations as its source (I did not dig deeper). The infogram seemingly pertains to graduates of PhDs in the UK in STEM fields.

I find the figures literally incredible. I cannot believe them. Fewer than 1-in-200 PhD graduates become professors? This would imply, for example, that STEM professors in the UK would need to graduate 200 PhD students just to "repopulate" themselves.

I would like to compare these estimates with figures sourced elsewhere. And so my question is:

Are any other studies or sources of data for estimating the number of PhD graduates who end up with professorships? (... preferably within the STEM areas and not restricted to the UK)

There is a related question specifically for the maths field and referring to tenure-track positions but none of the answers really address this question: What percentage of phds in math actually get a tenure track academic job?

EDIT: Pointer to a follow-up question asked by @gerrit: How many PhD students does a typical STEM professor graduate during their entire career?

  • professorship
  • career-path
  • tenure-track

Community's user avatar

  • 5 You're right: the 0.45% figure is literally incredible. I did some "Fermi problem" type calculations and came up with the idea that in mathematics about 20% of PhDs get tenure at a research institution (also Gerald Edgar mentioned this figure on mathoverflow.net) and that maybe 30-40% get tenure at some institution: this is in the US. In other STEM fields there are more industrial jobs, but I would be shocked if the average figure for STEM PhDs in the US were below 10%. (I don't include this as an answer because you want more formalized analysis, not guesswork...) –  Pete L. Clark Commented Feb 26, 2014 at 6:57
  • 42 A major question here is what "Professor" is supposed to mean --- academic titles in the UK work differently than in the US. Being a full professor in the UK is similar to having an endowed chair in the US, which very few US scientists ever reach. –  Mark Meckes Commented Feb 26, 2014 at 8:03
  • 17 Furthermore, I believe (though I'm not certain) that many (maybe most?) full-time, researching, career academics in the UK never hold any position with the word "professor" in the title. This is totally different from the US, where all tenure-track positions (and some non-tenure-track positions) are called some flavor of "professor". –  Mark Meckes Commented Feb 26, 2014 at 8:06
  • 7 If a professor works for 30 years (say ages 40-70) and the situation is steady-state, a 1:200 ratio would require a professor to graduate 6-7 PhD students per year. That seems like a lot. –  gerrit Commented Feb 26, 2014 at 19:06
  • 5 @gerrit that is assuming that professors are the only one allowed to produce PhD students. In my UK department only about 10% of those allowed to supervise PhD students are "Professors". This reduces the number by an order of magnitude, but it is still too big. –  StrongBad Commented Mar 4, 2014 at 10:02

5 Answers 5

Just looked up some numbers for Germany:

In 2013, 8700 PhDs were finished in maths/natural sciences.

average age at finishing (all fields): 32.5 a

average age at becoming professor (maths/natural sciences): 40.5 a

predicted number of retiring professors in 2021 = in 8 years = when last year's fresh PhDs reach the average age of becoming professor (maths/natural sciences): ca. 190

190 : 8700 ≈ 1 : 46 or 2.2 %

Some of the tables show only overall numbers, and no details for maths. But I think that this result is influenced by the fact that the majority of chemistry and biology students go on for a PhD (though I guess that a non-negligible fraction leaves for industry [slightly] before finishing the PhD - which after all may not be that different from doing a PhD in order to get a better entrance position in industry).

Sources: Statistisches Bundesamt

  • exam statistics
  • university staff statistics

cbeleites's user avatar

  • 3 So this ignores the fact that the number of overall tenured positions available will probably grow in the next 8 years? –  Federico Poloni Commented Mar 3, 2014 at 21:02
  • 1 Interesting sources (I don't read German but this looks more like what I'm asking for, thanks!) but I don't yet follow your math. Assuming that the number of tenured positions remains the same and the rates of PhDs and retirements remain the same, and that it's a closed system (i.e., no foreign professors), we have 8700 PhDs produced in one year and ⌊190/8⌋ = 23 professorial spaces likewise in one year. So that would make it 23 : 8700, no? Not sure why you took PhDs for 1 year and professors for 8 (even if graduates take 8 years, there'll be 8 sets of graduates in that time). –  badroit Commented Mar 4, 2014 at 14:34
  • 1 @badroit: no. I see now that my formulation was ambiguous and tried to clear it up. In 2021 (= in 8 years), 190 maths + natural sciences profs are expected to retire. –  cbeleites Commented Mar 4, 2014 at 15:17
  • 1 @FedericoPoloni: this ignores any predictions whether new professorships will be started (which is something I wouldn't dare to predict 8 years into the future, not even for Germany). But it does include the fact that in 2021 more professors will retire than do right now (at the moment it is ca. 150/a) - which is much easier to predict as long as the retirement age doesn't change too much. –  cbeleites Commented Mar 4, 2014 at 16:21
  • 1 @cbeleites, understood, thanks for the clarification! –  badroit Commented Mar 4, 2014 at 17:40

It's a shiny info-gram, but I think there is a lot wrong with it:

  • It transports the (common) misconception that the 53% leaving to industry after their PhD are sort of failed professors . At least in CS, and probably a lot of other STEM fields as well, many PhD students start with the full intention of leaving academia sometime. Hence, the better question the diagram should be asking is How many of those that want to become professors actually do? . Basically, I could come up with similar low percentages for every field. Let's say less than 1% of all working population of a city works in supermarkets. Does that mean that supermarket jobs are horribly hard to break into? No, because most people do not have the career goal of working in a supermarket in the first place.
  • Similarly for the 17% non-university research. In CS, good industry labs (like the ones at IBM or Microsoft) are preferable options for many researchers, so they would not take a professorship even if offered.
  • As already stated by commenters above, the title professor means different things in different places. In Austria, for instance, many high school teachers are officially "professors" (tenured even), despite not having a PhD or ever doing research. In Great Britain, very few people are professors (most are lecturers or senior lecturers). In Madrid I know an academic research lab (not affiliated with a university) that calls their staff members research professors . Job titles are almost never clear-cut.

That being said, I do think that there is a problem. If we assume a reasonably stable system (number of professors in a discipline stays more or less constant), then every tenured professor is in average allowed to see one of her/his students through to also become a tenured professor. Given that many tenured professors (at least here in Europe) maintain groups of 15+ PhD students at a time, I is pretty obvious even without digging into the data too much that the job market for professors is insanely competitive (which, incidentally, captures my personal experience hunting for tenure-track positions pretty well).

xLeitix's user avatar

  • 18 I have seen this graph in Physics Today, and would like to come to the defence of the authors: all your caveats were pointed out in full in the caption accompanying the graph. –  gerrit Commented Feb 26, 2014 at 18:56
  • 8 Correction: It was Physics World, not Physics Today. –  gerrit Commented Feb 26, 2014 at 19:27
  • 1 Coming from a field and country (chemistry/Germany) where the normal thing to do if you want a job in industry is to do a PhD (of course also if you want to stay in academia, but essentially here > 90 % of the graduating students go on with a PhD) I very much agree with the first point. Note also that this inflates the denominator of the fraction, making the fraction smaller compared to other fields where a PhD essentially means that you aim at a professorship. (The diagram would show this if it started with undergrad students: the main stream would just go all the way BSc -> MSc -> PhD) –  cbeleites Commented Mar 3, 2014 at 19:01

An article in Physics World has more information, and appears to be the source of the figure in question (I'm not entirely sure if it is the original source, as the article draws it data from elsewhere). The article is available to subscribers , and the full citation is:

  • Harris, Margaret. "The academic pyramid." Physics World 25, no. 10 (2012): 54-57.

It appears to be presently mirrored here , and my information is drawn from the mirror. It answers some questions on data sources that were lost when the image got its own life without proper context. Data are for STEM fields, and are relevant for the United Kingdom. The figure caption reads:

Transition points in typical academic scientific careers following a PhD. Based on data from the Higher Education Funding Council for England, the Research Base Funders Forum and the Higher Education Statistics Agency’s annual “Destinations of leavers from higher education” survey.

Furthermore, the article states:

Statistics suggest that the vast majority of people who complete science PhDs will never obtain a permanent academic post. This is vividly illustrated in a diagram published in 2010 by the Royal Society as part of a report on the future of scientific careers in the UK (figure 1). Drawing on data from various UK sources, the diagram follows a “typical academic career” through a series of post- PhD transition points, when large numbers of people leave the university environment for careers in, say, government or industrial research. These data show that less than 0.5% of science PhD students will ever become full professors, while just 3.5% will obtain lower-ranking permanent positions as research staff at universities. For physicists, that 3.5% figure is probably a little low. Slightly older data collected by the Institute of Physics and the US National Science Foundation suggest that the fraction of physics PhD students who obtain permanent academic jobs has historically hovered between 10 and 20%.

(...) But many more do want to stay in academia:

Indeed, according to an August 2012 survey carried out by the American Institute of Physics (AIP), nearly half (46%) of new physics PhD stu- dents at US institutions want to work in a university. The next most popular career plan among those surveyed, attracting 18% of responses, was “unsure”.

For more information, the article points to the UK group Vitae , UK science advocacy group Science is Vital , and the US NSF Statistics page .

So, for physics, it appears between ¼–½ of PhD students who want to get permanent academic positions, ultimately succeed in doing so. That's a quite different figure than 0.5% (but still problematic, as the article discusses in some detail).

gerrit's user avatar

  • 1 The statistic in your second quote is for new PhD students, though. Other statistics I have seen (I think for mathematics, but possibly for all subjects, in the UK) show that the proportion of PhD students intending to pursue an academic career drops off considerably later in the PhD. –  Tara B Commented Feb 28, 2014 at 14:12
  • 3 @TaraB That may be because they realise the poor opportunities. One could argue that the observation at the start is more appropriate, as it's more independent of probability of succeeding. –  gerrit Commented Feb 28, 2014 at 15:24
  • At the risk of thread necromancy, since PhDs (at least in the UK) have something like a 30% non-completion rate, the choice of counting at the start or end of the doctorate will have a rather major effect on the numbers... –  Flyto Commented May 30, 2018 at 8:37

Under stable situation, this probably can always be approximated by dividing the number of professor positions by the number of the PhD student positions, and normally makes numbers below 10 %. Same way you can calculate your chances of getting any other reputable, sufficiently well paid position below professor.

Apart lots of hard work, making to professors also requires a great deal of success. Counting on this is same as counting on getting a gold medal in Olympics: somebody does, but if this is the only your reason to participate, be ready for disappointments.

algorithmic_fungus's user avatar

  • 9 In the US, only a minority of "tenured professors" work in departments which grant PhDs: I would guess probably 1/3. Is it similar in Europe? (I would guess not so much.) I mention this as a possible explanation for why my percentages (which are US-centric, because that's what I know and have data for) are different from yours. –  Pete L. Clark Commented Feb 26, 2014 at 14:49
  • 2 Then multiply the number of professors positions by the factor you assume before calculating the proportion. In Europe, "professor" is normally a very highly ranked position in a university or the like. –  algorithmic_fungus Commented Feb 26, 2014 at 16:16
  • Audrius: Okay, good. That brings our calculations/estimates in line then. –  Pete L. Clark Commented Feb 26, 2014 at 17:13

Another related data point quoted from the article " The disposable academic " in the Economist.

Indeed, the production of PhDs has far outstripped demand for university lecturers. In a recent book, Andrew Hacker and Claudia Dreifus, an academic and a journalist, report that America produced more than 100,000 doctoral degrees between 2005 and 2009. In the same period there were just 16,000 new professorships. Using PhD students to do much of the undergraduate teaching cuts the number of full-time jobs. Even in Canada, where the output of PhD graduates has grown relatively modestly, universities conferred 4,800 doctorate degrees in 2007 but hired just 2,616 new full-time professors. Only a few fast-developing countries, such as Brazil and China, now seem short of PhDs.

The ratio of doctoral graduates to new professorships reported here (16% for the U.S. figures, 54.5% for Canada) is orders of magnitude higher than the statistics quoted in the question (0.45%).

Though the quoted numbers are not directly comparable with those of the question (quoted numbers are not STEM while those of the question are STEM; quoted numbers are from US/Canada while those of the question are from the UK; etc.) it is hard to understand why there would be an orders of magnitude difference.

(Perhaps there is some semantic difference in what "professor" is interpreted as, perhaps having a stricter meaning in the UK -- suggested by Mark Meckes in his comment -- as being something closer to having an endowed chair.)

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percentage of phd holders

Number of doctorate degrees (PhD degrees) compared internationally

  • Switzerland has the highest amount of obtained PHD degrees by scientists in the age of 25-34 year per 1,000 inhabitants in the same age category.
  • In the age category 25-34 year olds, the Netherlands has an average of 1,7 awarded PhD degrees per 1,000 inhabitants (2019).
  • Most of the PhD degrees are obtained in the scientific fields Health, Nature and Technology.

How many scientists aged 25-34 obtained their doctorate degree in 2019, per 1,000 inhabitants in the same age category?

2020
CHE 2,9
DEU 2
UK 2
DEN 1,8
NLD 1,7
BEL 1,6
IRL 1,4
AUT 1,3
SWE 1,2
EU-27 1,2
FRA 1,1
LUX 1,1
ESP 1,1
FIN 1,1
NOR 1,1
ITA 0,9
POR 0,7

Analysis The number of doctorate degrees per 1,000 persons aged 25-34 in 2019 is the highest in Switzerland with 2.9 doctorate degrees per 1,000 persons aged 25-34. Germany and the United Kingdom are in the group of 2 or more doctorate degrees per 1,000 persons in that age group. In 2020, the Netherlands had 1,7 doctorate degrees per 1,000 persons aged 25-34. 

In which field of science did these scientists obtain their doctorate ?

Unknown and generic Services Education Agriculture ICT Business administration and law Social sciences Arts and humanities Engineering Health Nature
FRA 0 0,008 0,015 0,014 0,053 0,073 0,101 0,134 0,144 0,12 0,34
UK 0 0 0,038 0,011 0,041 0,067 0,084 0,141 0,152 0,159 0,306
CHE 0 0 0,015 0,026 0,023 0,084 0,074 0,071 0,141 0,269 0,297
DEU 0 0,005 0,015 0,031 0,033 0,089 0,056 0,068 0,129 0,286 0,289
ITA 0 0,003 0,012 0,048 0,018 0,1 0,079 0,107 0,232 0,118 0,282
NOR 0 0,02 0,021 0,018 0,01 0,044 0,103 0,072 0,115 0,332 0,265
IRL 0 0,001 0,044 0,023 0,045 0,064 0,138 0,107 0,147 0,183 0,249
ESP 0 0,014 0,049 0,03 0,027 0,057 0,124 0,143 0,137 0,169 0,249
BEL 0 0,004 0,018 0,025 0,004 0,078 0,096 0,094 0,224 0,224 0,232
POL 0 0,024 0,018 0,037 0,013 0,083 0,088 0,211 0,12 0,178 0,214
SWE 0 0,005 0,033 0,018 0,038 0,031 0,061 0,044 0,269 0,297 0,196
AUT 0 0,006 0,02 0,036 0,045 0,118 0,053 0,114 0,249 0,138 0,191
POR 0 0,04 0,095 0,024 0,024 0,08 0,128 0,127 0,188 0,115 0,178
NLD 0 0 0,009 0,071 0,019 0,083 0,093 0,078 0,122 0,34 0,184
FIN 0 0,005 0,052 0,045 0,064 0,069 0,099 0,114 0,155 0,218 0,179
DNK 0 0 0 0,066 0 0 0,093 0,086 0,248 0,341 0,167

Analysis What is striking in the second graph is that the Netherlands has the largest share of doctorate degrees in the field of health sciences and in the field of agriculture. In addition, the Netherlands has a relatively small share of doctorate degrees in the fields nature, technology, humanities, IT and education.  

The excel-file contains more data concerning doctorate degrees in EU-countries, differentiated by men and women.

Definitions and abbreviations

For an explanation of the used definitions and abbreviations we refer to the webpage  Definitions for Science in Figures .

New doctorate degrees

file type xlsx - file size 21.17 KB

Related publications

  • Share of graduates in science and technology in higher education compared internationally
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Education & Science

  • Doctoral degrees earned in the United States 2020/21, by ethnicity

Number of doctoral degrees earned in the United States in 2020/21, by ethnicity

EthnicityNumber of degrees
White108,082
Non- resident alien23,479
Asian/ Pacific Islander22,533
Black17,041
Hispanic16,465
Two or more races5,769
American Indian/ Alaska Native690

Additional Information

Show sources information Show publisher information Use Ask Statista Research Service

September 2022

United States

2020 to 2021

Doctoral degrees include Ph.D., E.D., and comparable degrees at the doctoral level, as well as such degrees as M.D., D.D.S., and law degrees that were formerly classified as first-professional degrees.

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From admission to dissertation. Tips on making the PhD journey happy, productive and successful

Number of phds per country

When coming to PhD, it is not that every country could produce easily. Here is the percentage levels of each country’s PhD doctorates. Usually this census and survey is conducted by PhDstudytips in the month of october 2019. Here are the results of the number of phds per country.

CountryNumber of PhDs
United States92459
Germany53157
South Africa5032
Russia5223
Indonesia6599
India49300
Japan27059
France23037
Turkey7516
Canada12099
Australia15300
Korea22751
Spain21434
Italy27555

The number of PhD holders are growing day by day due to competition in the education field. In the past PhD was a special degree but now it is no more an advanced degree. The reasons are too many. One strongest reason that PhD is mandatory in some countries to get jobs. With out PhD you cannot be a professor in some of the big universities. So what If some one has a desire to become a professor or lecturer? He suppose to get a PhD. So the number of Phds are growing day by with a huge percentage. There is a lot of variation in the number of PhDs when compared to the 2014 survey conducted by Forbes.

PhD is no more a qualification of great scientists but it is a normal course that anybody can get into when they are young enough. Though many regret why they had not done PhD, the truth is otherwise. Many students are not stopping their studies just with masters but continuing with great zeal till they do away with PhD.

Women are getting more phds according to the survey conducted by statista here are the results.

When we check the above data, women are too much enticed in doing PhD than men. As university job is secure and relaxing for women than any other jobs out there.

Here, I am giving the exact details why some countries are lacking in delivering right PhD candidates.

  • Research in some countries are not as per good standards.
  • Poor ways of innovation.
  • Plagiarism of research.
  • Lack of encouragement for a good research.

These reasons do make some countries fall short back to produce number of phds worldwide. If someone could take care of this pitfalls then things would be far more better than before. Only united states and germany scholars produce quality research. Whilst other countries have phds great in number but the quality of innovation is poor compared to most European countries. One of such low quality research comes from countries like India and Turkey.

If you want to pursue PhD where the number is high and quality as well, these are the top ranked universities in the world.

Name of UniversityRank
University of Oxford1
California Institute of Technology2
University of Cambridge3
Stanford4

Doing PhD in the above university means, you have got a great admiration in the future. You PhD will gain enormous value forever.

The scope of getting into these universities depends upon your intelligence and percentage levels through out your academic outputs. If you are good at these things, you can just get into those great innovators of life experiments.

Syam Prasad Reddy T

Hello, My name is Syam, Asst. Professor of English and Mentor for Ph.D. students worldwide. I have worked years to give you these amazing tips to complete your Ph.D. successfully. Having put a lot of efforts means to make your Ph.D. journey easier. Thank you for visiting my Ph.D. blog.

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Ph.D. Student Affiliation and Backstop Funding Policy

To clarify The Graduate School (TGS) expectations regarding the financial obligation for Ph.D. student funding.

Full time Ph.D. students who are in good academic standing and are making adequate progress toward their degree are guaranteed financial support for their first five consecutive academic years beginning at the date of matriculation into the Graduate School. In order to make this guarantee, The Graduate School must have a Management Center backstop for each graduate student in order to protect each student from the potential loss of external funding during his or her projected years of study. Continued support is, as always, contingent on acceptable academic and research performance as determined in an ongoing manner by the student’s advisor, Director of Graduate Studies, and committee, where appropriate. The term “affiliate” is used in this document exclusively to mean the choice of a degree program open to Ph.D. students who have matriculated into an admitting program in which the student can complete the degree in any one of the programs or departments designated as affiliates of the admitting program.

  • In the event that a student selects a thesis advisor from a department or program other than the admitting department or program, and therefore opts to affiliate with the advisor’s department or program to complete the Ph.D., the student should be funded in accordance with the compensation model of the department or program with which the student affiliates. Students must be advised by their admitting program Director of Graduate Studies that their stipend level will correspond to that practiced in the department or program of their chosen affiliation. Funding can be provided through any combination of departmental or competitive fellowship, teaching or research assistantship, or external support.  
  • In the event that a Ph.D. student’s thesis advisor is the primary source of the student’s support and is unable to meet the five-year funding commitment, the student’s support (tuition remission, fees, and stipend) will be covered by the department or program that receives the indirect cost revenues (ICRs) generated by the thesis advisor’s grants until such a time as suitable rearrangements can be made for renewed support. In most cases, such “backstop” support will come from the department in which the thesis advisor holds his/her primary appointment. Backstop funding agreements are expected to occur for the first five consecutive years of study, which is the standard institutional funding commitment to Ph.D. students. In some schools or graduate programs, this commitment continues until the end of the Ph.D. student’s career.  
  • When a graduate student’s thesis advisor has a primary, tenure track appointments in one unit but the ICR revenue from the advisor’s grants flows to another organizational unit within Duke, such as in the University Institutes and Centers (UICs) that are jointly funded by the Provost Area Management Center (PAMC) and the Medical Center Management Center (MCMC), the backstop agreement will be as follows:  
  • 50 percent from the UIC budget
  • 25 percent from Graduate School reserves, on behalf of the PAMC
  • 25 percent from School of Medicine graduate student reserves, on behalf of the MCMC  
  • Backstop funding should be provided when there are changes in faculty advisor, whether due to the advisor leaving the institution or other reasons causing interruptions or delays in mentor support. The funding can be provided through any combination of departmental or competitive fellowship, teaching or research assistantship, or external support.
  • Faculty advisors will be expected to commit and attest to the financial obligations outlined herein by completing and signing the  Statement of Financial Support form (PDF) .
  • The director of graduate studies assistant (DGSA) of the admitting department or program should complete the form, obtaining all required signatures.
  • Electronic copies (PDF) of the completed forms should be uploaded into the student’s electronic record in Perceptive Content ( Instructions ).
  • For admitting programs in the School of Medicine, an electronic copy should also be available to the Office of Biomedical Graduate Education (OBGE) upon request.

Issued Date

Last revised, last reviewed, related documents.

  • form_statement_of_financial_support.pdf

Financial Support

Financial Support Policy

IMAGES

  1. Percentage of bachelor's-degree holders who attained PhDs as a function

    percentage of phd holders

  2. PhD FAQs

    percentage of phd holders

  3. These Countries Produce the Most PhD Graduates in the World

    percentage of phd holders

  4. Women were awarded more PhDs in the US than men last year

    percentage of phd holders

  5. Which countries have the highest numbers of doctoral graduates?

    percentage of phd holders

  6. Percentage of male and female Ph.D. holders with different ranges of

    percentage of phd holders

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  1. PhD Percentage by Country / Number of Doctorate Degrees per Country 2024

    2.5%. 3%. 3.5%. 4%. Click on a country for details. PhD Percentage by Country / Number of Doctorate Degrees per Country 2024. 1. Slovenia. Slovenia is the highest-ranking country in the number of Ph.D. degrees earned by adults between the ages of 25 and 64. 5% of the entire population in Slovenia has a Ph.D.

  2. How Rare (or Common) is it to have a PhD?

    The distribution of men and women doing a PhD also varies from country to country. According to the Higher Education Statistics Agency (HESA), in the UK, 48 per cent of graduates with a doctoral qualification were female and 51 per cent were male in 2021-22. Across the world, the percentage of men with a doctoral qualification is generally ...

  3. Which countries have the most doctoral graduates?

    Percentage of the population holding doctoratesImage: OECD, Education at a Glance 2019. Growing pool of doctoral candidates. When it comes to sheer numbers, the United States has the most doctoral graduates by far (71,000 in 2017), though it is ranked fourth in per capita terms. Germany and the United Kingdom are next with around 28,000 each.

  4. How many people have a PhD? Data from OECD countries

    According to the OECD's Education at a Glance 2022 report, 1.3% of adults (25-64 year-olds) held a PhD in 2021 across the thirty-eight OECD countries. There are of course country-specific differences. In Denmark and Germany, for instance, roughly 1% of the total population held a PhD in 2021.

  5. Survey of Earned Doctorates (SED)

    The Survey of Earned Doctorates is an annual census conducted since 1957 of all individuals receiving a research doctorate from an accredited U.S. institution in a given academic year. The SED is sponsored by the National Center for Science and Engineering Statistics (NCSES) within the National Science Foundation (NSF) and by three other ...

  6. Doctorate Recipients from U.S. Universities

    Doctorate Recipients from U.S. Universities: 2021 (Data Tables) Data Tables | NSF 23-300 | October 18, 2022. Survey of Earned Doctorates Field of Study Taxonomy Changes in 2021 and Impact on Trend Data. Working Papers | NCSES 23-200 | October 18, 2022.

  7. U.S. higher education: doctoral degrees by field of research 2021

    Temporary visa holders completing U.S. doctorates 2021, by country of origin Active doctors of medicine in the U.S. by place of education 1985-2015 U.S. states that awarded the most doctorates 2021

  8. PhD Source

    Nearly 39% PhDs have a postdoctoral commitment, with approximately 59% of PhDs in life sciences and physical and earth sciences going into postdocs. On the other end, less than 8.5% of PhDs in education have postdoctoral commitments. It's okay if you aren't interested in doing a postdoc after you finish your PhD.

  9. These countries have the most doctoral graduates

    India had 24,300. Although fifth on the list, Japan only has a quarter of the PhD graduates that the US has, with 16,039. In sixth and seventh place, France and South Korea have 13,729 and 12,931 respectively. Spain and Italy, in eighth and ninth, have a similar number, 10,889 and 10,678 respectively. Australia is in 10th place with 8,400.

  10. Doctorate Recipients from U.S. Universities: 2021

    Research doctorate recipients from U.S. colleges and universities: 1958-2021. 1-2. Research doctorate recipients, by historical broad field of doctorate and 2018 Carnegie Classification of doctorate institution: 2011-21. 1-3. Research doctorate recipients, by historical major field of doctorate: Selected years, 1991-2021. 1-4.

  11. List of countries by number of doctorates awarded

    This is a list of countries by the number of PhD degrees awarded in 2014 as per data available with the OECD. * indicates "Research in COUNTRY or TERRITORY" or "Universities in COUNTRY or TERRITORY" links. Country PhDs awarded (2014)

  12. Doctorates Awarded by Country 2024

    Germany, the United Kingdom, and Russia all produce roughly even amounts of doctorates, around 27,000-28,000 per year. Just ten nations earn more than 10,000 doctoral degrees annually. Overall, approximately 277,000 doctoral degrees are awarded worldwide each year. There are plenty of countries on the opposite end of the spectrum as well.

  13. Population with Doctorate Degrees in the U.S.

    Not surprisingly, Los Alamos, N.M., home to a major national research laboratory, has the highest percentage of people with doctorate degrees in the nation, at 17.7 percent - nearly twice the 9.5 percent reported by Tompkins County, N.Y., home of Cornell University. Orange County, N.C., home of the University of North Carolina at Chapel Hill ...

  14. Number of doctorate recipients in the U.S. by state 2021

    Number of post-graduate students in Vietnam 2016-2020; ... Percentage of U.S. population groups with a bachelor's degree, by ethnicity 2010; Topics

  15. Doctorate Recipients from U.S. Universities: 2020

    Top 40 countries of origin of temporary visa holders earning U.S. doctorates, ranked by number of doctorate recipients: 2020: View Table 25: Download Table 25 Excel: Download Table 25 PDF: 26 Table 26: Top 10 countries of origin of temporary visa holders earning U.S. doctorates, by country of citizenship and field of study: 2010-20: View Table 26

  16. U.S. higher education

    Doctoral degrees earned in the United States 1950-2032, by gender. In the academic year of 2020/21, about 85,370 male and 108,690 female students earned a doctoral degree in the United States. By ...

  17. Fast Facts: Degrees conferred by race/ethnicity and sex (72)

    The percentage of degrees conferred by race/ethnicity and sex varied by level of degree in 2021-22. 1 Includes Ph.D., Ed.D., and comparable degrees at the doctoral level, as well as such degrees as M.D., D.D.S., and law degrees that were classified as first-professional degrees prior to 2010-11. NOTE: Data in this table represent the 50 ...

  18. What ratio of PhD graduates in STEM fields ultimately end up as

    In the same period there were just 16,000 new professorships. Using PhD students to do much of the undergraduate teaching cuts the number of full-time jobs. Even in Canada, where the output of PhD graduates has grown relatively modestly, universities conferred 4,800 doctorate degrees in 2007 but hired just 2,616 new full-time professors.

  19. Number of doctorate degrees (PhD degrees) compared ...

    The number of doctorate degrees per 1,000 persons aged 25-34 in 2019 is the highest in Switzerland with 2.9 doctorate degrees per 1,000 persons aged 25-34. Germany and the United Kingdom are in the group of 2 or more doctorate degrees per 1,000 persons in that age group. In 2020, the Netherlands had 1,7 doctorate degrees per 1,000 persons aged ...

  20. U.S. higher education: doctoral degrees by ethnicity 2021

    Basic Statistic Temporary visa holders completing U.S. doctorates 2021, by country of origin Basic Statistic Number of students taking distance education courses U.S. 2007/08, by ethnicity

  21. Labour market perspectives for PhD graduates in Europe

    The average unemployment rate for doctorate holders (at 2%) was roughly three percentage points lower than that for other tertiary level graduates, with highest shares of unemployed PhD holders in humanities and natural sciences (OECD CDH, 2013).

  22. Number of phds per country

    Here is the percentage levels of each country's PhD doctorates. Usually this census and survey is conducted by PhDstudytips in the month of october 2019. Here are the results of the number of phds per country. ... The number of PhD holders are growing day by day due to competition in the education field. In the past PhD was a special degree ...

  23. Ph.D. Student Affiliation and Backstop Funding Policy

    25 percent from Graduate School reserves, on behalf of the PAMC 25 percent from School of Medicine graduate student reserves, on behalf of the MCMC Backstop funding should be provided when there are changes in faculty advisor, whether due to the advisor leaving the institution or other reasons causing interruptions or delays in mentor support.